Her cousin Robert Jackman shared an image of the letter on Facebook and said: "This is a letter from my cousin Olivia who is 9 years old. Olivia told her Mam it was for the Irish Government."

In the letter, Olivia writes: "Dear Irish leaders, Hi my name is Olivia, I am nine years old, I don't know why there is a vote but my uncle my to get married to a man and I would be devastated if he was not really married.

"I would love if everybody would vote Yes. Spread the word - vote yes. There is no difference, it's just true love.